A mild and recyclable nano-sized nickel catalyst for the Stille reaction in water
A mild and recyclable nano-sized nickel catalyst for the Stille reaction in water
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DOI：
10.1039/c2cy00466f
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发表时间：
2012-03
影响因子：
5
通讯作者：
Lei Wu;Xiao Zhang;Zhimin Tao
中科院分区：
文献类型：
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作者：
Lei Wu;Xiao Zhang;Zhimin Tao
我们首次报道了纳米镍催化剂(膦树枝状大分子稳定的纳米镍颗粒)在水中Stille偶联反应中的应用。研究发现，镍纳米颗粒在常温水介质中的反应中具有很高的活性和可回收利用，没有助催化剂，提供了很好到很好的联芳基的产率。通过与分子络合物的平行实验和回收实验中的金属浸出实验，以及回收的纳米催化剂的透射电子显微镜观察，证明了催化过程是非均相的，发生在纳米镍颗粒的表面。
We report here the first application of nano-sized nickel catalysts (phosphine dendrimer stabilized nickel nano-particles) for the Stille coupling reaction in water. The nickel nanoparticles were found to be highly active and recyclable in the reactions at ambient temperature in water medium, without co-catalyst, affording the biaryls with good to excellent yields. The catalytic process was proven to be heterogeneous, occurring on the surface of nickel nanoparticles based on parallel experiments with molecular complexes and metal leaching tests in recycling experiments as well as TEM morphology of recovered nanocatalysts.